I agree with baxterj. If you follow historical practice you don't need army lists and no army list could realistically cover the historical variety without making so many exceptions it would be meaningless.
Having said that I think Markconz suggestion will work for those who like to use points.

I understand the points based systems for players who prefer equal forces though must confess to never having been enticed by that in Napoleonics. Not a judgement in any fashion at all, just my opinion.

The scenario style game between often unmatched forces and uneven forces has always been my preference and the occassional random element being introduced at the mist unexpected occasion.